/*
 * Copyright (c) 2015, ARM Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <stdio.h>
#include <openssl/sha.h>

#include "debug.h"

#define BUFFER_SIZE    256

int sha_file(const char *filename, unsigned char *md)
{
    FILE *inFile;
    SHA256_CTX shaContext;
    int bytes;
    unsigned char data[BUFFER_SIZE];

    if ((filename == NULL) || (md == NULL)) {
        ERROR("%s(): NULL argument\n", __FUNCTION__);
        return 0;
    }

    inFile = fopen(filename, "rb");
    if (inFile == NULL) {
        ERROR("Cannot read %s\n", filename);
        return 0;
    }

    SHA256_Init(&shaContext);
    while ((bytes = fread(data, 1, BUFFER_SIZE, inFile)) != 0) {
        SHA256_Update(&shaContext, data, bytes);
    }
    SHA256_Final(md, &shaContext);

    fclose(inFile);
    return 1;
}
